National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

Fair

54°F

12°C

Humidity 32%
Wind Speed W 15 G 22 mph
Barometer 30.12 in (1020.8 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 5 Apr 2:55 pm CDT
Extended Forecast for

3 Miles ENE Ontario WI

  • Tonight

    Tonight: A 50 percent chance of showers, mainly before 9pm. Mostly cloudy, with a low around 31. Northwest wind 9 to 11 mph, with gusts as high as 20 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 31 °F

    Chance
    Showers then
    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 42. Breezy, with a northwest wind 11 to 16 mph, with gusts as high as 24 mph.

    High: 42 °F

    Mostly Cloudy
    then Mostly
    Sunny and
    Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 16. Northwest wind 6 to 11 mph becoming light northeast after midnight. Winds could gust as high as 20 mph.

    Low: 16 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 42. Calm wind becoming south around 6 mph in the afternoon.

    High: 42 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of snow showers before 1am, then rain and snow showers likely between 1am and 4am, then rain showers likely after 4am. Mostly cloudy, with a low around 31. Southeast wind 6 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 31 °F

    Chance Snow
    Showers then
    Rain/Snow
    Likely

  • Wednesday

    Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 63. Breezy, with a south wind 14 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 63 °F

    Showers
    Likely and
    Breezy

  • Wednesday Night

    Wednesday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 42. Breezy, with a southwest wind 8 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 70%.

    Low: 42 °F

    Showers
    Likely and
    Breezy

  • Thursday

    Thursday: A 30 percent chance of showers, mainly after 1pm. Mostly sunny, with a high near 57. West wind 7 to 10 mph, with gusts as high as 20 mph.

    High: 57 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of showers. Partly cloudy, with a low around 32. West wind around 5 mph becoming calm in the evening.

    Low: 32 °F

    Chance
    Showers

Detailed Forecast

Tonight
A 50 percent chance of showers, mainly before 9pm. Mostly cloudy, with a low around 31. Northwest wind 9 to 11 mph, with gusts as high as 20 mph. New precipitation amounts of less than a tenth of an inch possible.
Monday
Partly sunny, with a high near 42. Breezy, with a northwest wind 11 to 16 mph, with gusts as high as 24 mph.
Monday Night
Mostly clear, with a low around 16. Northwest wind 6 to 11 mph becoming light northeast after midnight. Winds could gust as high as 20 mph.
Tuesday
Sunny, with a high near 42. Calm wind becoming south around 6 mph in the afternoon.
Tuesday Night
A chance of snow showers before 1am, then rain and snow showers likely between 1am and 4am, then rain showers likely after 4am. Mostly cloudy, with a low around 31. Southeast wind 6 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 63. Breezy, with a south wind 14 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 42. Breezy, with a southwest wind 8 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 70%.
Thursday
A 30 percent chance of showers, mainly after 1pm. Mostly sunny, with a high near 57. West wind 7 to 10 mph, with gusts as high as 20 mph.
Thursday Night
A 40 percent chance of showers. Partly cloudy, with a low around 32. West wind around 5 mph becoming calm in the evening.
Friday
A 30 percent chance of showers. Mostly sunny, with a high near 57. Calm wind becoming north around 5 mph in the afternoon.
Friday Night
A 30 percent chance of showers. Partly cloudy, with a low around 35. Light and variable wind.
Saturday
A 40 percent chance of showers. Partly sunny, with a high near 59. Southeast wind 5 to 8 mph.
Saturday Night
Showers likely. Mostly cloudy, with a low around 46. Southeast wind around 7 mph. Chance of precipitation is 60%.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 69. South wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ENE Ontario WI
 43.73°N 90.55°W
Last Update:
1:26 pm CDT Apr 5, 2026
Forecast Valid:
4pm CDT Apr 5, 2026-6pm CDT Apr 12, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation